Septum-Anchored Heart Valve Prosthesis Design
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Solution Overview
Problem
Current heart valve replacement technologies face challenges in accurately positioning and fixing prosthetic valves due to the complex physiological structures and environments of mitral and tricuspid valves, leading to issues such as blockage of blood flow, tissue damage, and increased risk of complications like heart failure and surgical failure.
Innovation Solution
A heart valve prosthesis anchored to the interventricular septum, featuring a valve supporting frame with a fixing device that includes a fixing and supporting section connected to the interventricular septum, allowing for anchoring without radially dilating the native valve annulus, and a ring that conforms to the non-uniform contour of the atrial wall to minimize tissue contact and improve leak resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the prosthetic valve is anchored to the native valve annulus by radial dilation, then anchoring force is achieved, but the native valve annulus is damaged and blood flow is obstructed
Solution Approach 1:
The patent extracts the anchoring function from the valve annulus by introducing a separate anchoring device that engages with the interventricular septum. The fixing member is inserted through the valve supporting frame and anchored into the septum, removing the need to radially dilate and damage the native valve annulus while still achieving secure anchoring of the prosthetic valve.
Solution Approach 2:
The patent introduces the interventricular septum as an intermediary anchoring target. Instead of directly anchoring to the valve annulus, the fixing member passes through the valve supporting frame and anchors into the septum, which serves as a mediator that provides anchoring force without requiring damage to the valve annulus or obstruction of blood flow.
2Stability of the object's composition
If the valve supporting frame is made large to provide sufficient support, then anchoring stability is improved, but blood flow in the outflow tract is blocked
Solution Approach 1:
The patent shifts the anchoring dimension from radial (within the valve plane) to axial (perpendicular to the valve plane by anchoring into the septum). The fixing member extends through the valve supporting frame and anchors into the interventricular septum, providing stability in a different dimensional direction that does not require a large frame size that would block blood flow.
3Ease of operation
If the conveying conduit is used to deliver the prosthetic valve, then minimally invasive delivery is achieved, but precise positioning and release control are difficult
Solution Approach 1:
The patent incorporates preliminary positioning features into the conveying conduit system, including positioning grooves and engagement structures that guide the prosthetic valve to the correct position before release. The fixing member is pre-loaded in a compressed state within the conveying conduit, and its release is controlled by specific actions (such as breaking a connection or releasing a lock) that ensure precise timing and positioning.
Data Source
AI summary
A heart valve prosthesis anchored to an interventricular septum. The heart valve prosthesis includes a valve supporting frame and a fixing device. The valve supporting frame includes a valve stitching section and an artificial valve, and the artificial valve is fixedly connected to the valve stitching section; the fixing device includes a fixing and supporting section and a fixing member, one end of the fixing and supporting section is connected to a proximal end of the valve stitching section, and another end of the fixing and supporting section is connected to the interventricular septum of a patient by the fixing member, to support the heart valve prosthesis and prevent the heart valve prosthesis from axially moving.